package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;



    /**
     * 新增菜品及口味接口
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        //向口味表插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQueryDish(DishPageQueryDTO dishPageQueryDTO) {
        //开启分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQueryDish(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据Id批量删除菜品
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //查看菜品是否在售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                //套餐在售卖中不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //查看菜品是否在套餐中
        List<Long> setmealIds = setmealDishMapper.getSetmeslDishIds(ids);
        if(setmealIds != null  && setmealIds.size() > 0){
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        /*for (Long id : ids) {
            //删除菜品
            dishMapper.deleteDish(id);
            //删除口味
            dishFlavorMapper.deleteFlavorMapper(id);
        }*/

        //根据ids集合批量删除菜品
        dishMapper.deleteDishIds(ids);
        //根据ids集合批量删除菜品口味
        dishFlavorMapper.deleteFlavorIds(ids);
    }

    /**
     * 根据id查询菜品及口味信息
     * @param id
     * @return
     */
    @Override
    public DishVO getByWithFlavor(Long id) {
        //根据id获取菜品信息
        Dish dish = dishMapper.getById(id);
        //根据id获取菜品口味信息
        List<DishFlavor> dishFlavors = dishFlavorMapper.getFlavor(id);
        //把查询到的结果封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        log.info("口味:{}",dishDTO.getFlavors());
        //修改菜品基础信息
        dishMapper.updateDish(dish);
        //删除原有口味数据
        dishFlavorMapper.deleteFlavorIds(Collections.singletonList(dish.getId()));
        //新增需要修改口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 修改菜品状态
     */
    @Override
    public void startOrStop(Integer status,Long id) {
        Dish dish = Dish.builder()
                        .status(status)
                        .id(id)
                        .build();
        dishMapper.updateDish(dish);
    }

    /**
     * 根据分组id查询菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getCategoryId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();

        return dishMapper.getCategoryId(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getCategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getFlavor(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
